The radius of a hydrogen atom is 0.0000000529177 of a millimeter. Express this number as an approximation.

Question

Responses:

0.0000000053
0.0000000053

0.0000005
0.0000005

0.00000006
0.00000006

0.00000005

Answer 1

To approximate the radius of a hydrogen atom, we can look at the number 0.0000000529177 more closely.

When we round this number to two decimal places in scientific notation (noting that we typically look at the first few significant figures), we see that:

0.0000000529177 is approximately 0.00000005 when rounded to two significant figures.

Therefore, the best approximation from the provided responses is:

0.00000005.